Description
In Artifex MuJS through 1.2.0, jsP_dumpsyntax in jsdump.c has a NULL pointer dereference, as demonstrated by mujs-pp.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mujs | 1.2.0-3 | — |
| Debian 13 | mujs | 1.2.0-3 | — |
| Debian 12 | mujs | 1.2.0-3 | — |
| Debian 11 | mujs | 1.1.0-1+deb11u2 | DSA-5291-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | mujs | 1.1.3-3ubuntu0.1~esm1 | USN-7575-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mujs | 1.3.0-r0 | — |
| Alpine v3.23 | mujs | 1.3.0-r0 | — |
| Alpine v3.22 | mujs | 1.3.0-r0 | — |
| Alpine v3.21 | mujs | 1.3.0-r0 | — |
| Alpine v3.20 | mujs | 1.3.0-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mujs | 1.3.0-r0 | — |
| Alpine v3.18 | mujs | 1.3.0-r0 | — |
| Alpine v3.17 | mujs | 1.3.0-r0 | — |
Advisories 2
- USN-7575-1 mujs vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5291-1 mujs - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/ccxvii/mujs/issues/161
- DSA-5291 vendor-advisory
- FEDORA-2022-c4b56e4400 vendor-advisory